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Merge pull request #1516 from Unity-Technologies/lw/shadow-optimization

Lw/shadow optimization
/main
GitHub 6 年前
当前提交
93c87374
共有 14 个文件被更改,包括 30 次插入19 次删除
  1. 3
      com.unity.render-pipelines.lightweight/LWRP/Editor/ShaderGraph/lightweightPBRForwardPass.template
  2. 10
      com.unity.render-pipelines.lightweight/LWRP/Editor/ShaderPreprocessor.cs
  3. 4
      com.unity.render-pipelines.lightweight/LWRP/LightweightPipeline.cs
  4. 10
      com.unity.render-pipelines.lightweight/LWRP/Passes/DirectionalShadowsPass.cs
  5. 1
      com.unity.render-pipelines.lightweight/LWRP/Passes/ForwardLitPass.cs
  6. 7
      com.unity.render-pipelines.lightweight/LWRP/ShaderLibrary/Shadows.hlsl
  7. 7
      com.unity.render-pipelines.lightweight/LWRP/Shaders/LightweightScreenSpaceShadows.shader
  8. 1
      com.unity.render-pipelines.lightweight/LWRP/Shaders/LightweightStandard.shader
  9. 1
      com.unity.render-pipelines.lightweight/LWRP/Shaders/LightweightStandardSimpleLighting.shader
  10. 1
      com.unity.render-pipelines.lightweight/LWRP/Shaders/Terrain/LightweightStandardTerrain.shader
  11. 1
      com.unity.render-pipelines.lightweight/LWRP/Shaders/Terrain/LightweightStandardTerrainAddPass.shader
  12. 1
      com.unity.render-pipelines.lightweight/LWRP/Shaders/Terrain/LightweightStandardTerrainBase.shader
  13. 1
      com.unity.render-pipelines.lightweight/LWRP/Shaders/Terrain/LightweightWavingGrass.shader
  14. 1
      com.unity.render-pipelines.lightweight/LWRP/Shaders/Terrain/LightweightWavingGrassBillboard.shader

3
com.unity.render-pipelines.lightweight/LWRP/Editor/ShaderGraph/lightweightPBRForwardPass.template


#pragma multi_compile _ _SHADOWS_ENABLED
#pragma multi_compile _ _LOCAL_SHADOWS_ENABLED
#pragma multi_compile _ _SHADOWS_SOFT
#pragma multi_compile _ _SHADOWS_CASCADES
// -------------------------------------
// Unity defined keywords

}
ENDHLSL
}
}

10
com.unity.render-pipelines.lightweight/LWRP/Editor/ShaderPreprocessor.cs


public static readonly ShaderKeyword DirectionalShadows = new ShaderKeyword(LightweightKeywordStrings.DirectionalShadows);
public static readonly ShaderKeyword LocalShadows = new ShaderKeyword(LightweightKeywordStrings.LocalShadows);
public static readonly ShaderKeyword SoftShadows = new ShaderKeyword(LightweightKeywordStrings.SoftShadows);
public static readonly ShaderKeyword CascadeShadows = new ShaderKeyword(LightweightKeywordStrings.CascadeShadows);
public static readonly ShaderKeyword Lightmap = new ShaderKeyword("LIGHTMAP_ON");
public static readonly ShaderKeyword DirectionalLightmap = new ShaderKeyword("DIRLIGHTMAP_COMBINED");

bool StripInvalidVariants(ShaderCompilerData compilerData)
{
bool isShadowVariant = compilerData.shaderKeywordSet.IsEnabled(LightweightKeyword.DirectionalShadows) ||
compilerData.shaderKeywordSet.IsEnabled(LightweightKeyword.LocalShadows);
bool isDirectionalShadows = compilerData.shaderKeywordSet.IsEnabled(LightweightKeyword.DirectionalShadows);
bool isShadowVariant = isDirectionalShadows || compilerData.shaderKeywordSet.IsEnabled(LightweightKeyword.LocalShadows);
if (!isDirectionalShadows && compilerData.shaderKeywordSet.IsEnabled(LightweightKeyword.CascadeShadows))
return true;
if (compilerData.shaderKeywordSet.IsEnabled(LightweightKeyword.SoftShadows) && !isShadowVariant)
if (!isShadowVariant && compilerData.shaderKeywordSet.IsEnabled(LightweightKeyword.SoftShadows))
return true;
if (compilerData.shaderKeywordSet.IsEnabled(LightweightKeyword.VertexLights) &&

4
com.unity.render-pipelines.lightweight/LWRP/LightweightPipeline.cs


bool supportsScreenSpaceShadows = SystemInfo.graphicsDeviceType != GraphicsDeviceType.OpenGLES2;
shadowData.renderDirectionalShadows = pipelineAsset.supportsDirectionalShadows && hasDirectionalShadowCastingLight;
shadowData.requiresScreenSpaceShadowResolve = shadowData.renderDirectionalShadows && supportsScreenSpaceShadows;
// we resolve shadows in screenspace when cascades are enabled to save ALU as computing cascade index + shadowCoord on fragment is expensive
shadowData.requiresScreenSpaceShadowResolve = shadowData.renderDirectionalShadows && supportsScreenSpaceShadows && pipelineAsset.cascadeCount > 1;
shadowData.directionalLightCascadeCount = (shadowData.requiresScreenSpaceShadowResolve) ? pipelineAsset.cascadeCount : 1;
shadowData.directionalShadowAtlasWidth = pipelineAsset.directionalShadowAtlasResolution;
shadowData.directionalShadowAtlasHeight = pipelineAsset.directionalShadowAtlasResolution;

10
com.unity.render-pipelines.lightweight/LWRP/Passes/DirectionalShadowsPass.cs


if (success)
{
shadowQuality = (shadowData.supportsSoftShadows) ? light.shadows : LightShadows.Hard;
// In order to avoid shader variants explosion we only do hard shadows when sampling shadowmap in the lit pass.
// GLES2 platform is forced to hard single cascade shadows.
if (!shadowData.requiresScreenSpaceShadowResolve)
shadowQuality = LightShadows.Hard;
SetupDirectionalShadowReceiverConstants(ref context, cmd, ref shadowData, shadowLight);
SetupDirectionalShadowReceiverConstants(cmd, ref shadowData, shadowLight);
}
}
context.ExecuteCommandBuffer(cmd);

shadowData.renderedDirectionalShadowQuality = shadowQuality;
}
void SetupDirectionalShadowReceiverConstants(ref ScriptableRenderContext context, CommandBuffer cmd, ref ShadowData shadowData, VisibleLight shadowLight)
void SetupDirectionalShadowReceiverConstants(CommandBuffer cmd, ref ShadowData shadowData, VisibleLight shadowLight)
{
Light light = shadowLight.light;

1
com.unity.render-pipelines.lightweight/LWRP/Passes/ForwardLitPass.cs


CoreUtils.SetKeyword(cmd, LightweightKeywordStrings.DirectionalShadows, directionalShadowQuality != LightShadows.None);
CoreUtils.SetKeyword(cmd, LightweightKeywordStrings.LocalShadows, localShadowQuality != LightShadows.None);
CoreUtils.SetKeyword(cmd, LightweightKeywordStrings.SoftShadows, hasSoftShadows);
CoreUtils.SetKeyword(cmd, LightweightKeywordStrings.CascadeShadows, shadowData.directionalLightCascadeCount > 1);
// TODO: Remove this. legacy particles support will be removed from Unity in 2018.3. This should be a shader_feature instead with prop exposed in the Standard particles shader.
CoreUtils.SetKeyword(cmd, "SOFTPARTICLES_ON", cameraData.requiresSoftParticles);

7
com.unity.render-pipelines.lightweight/LWRP/ShaderLibrary/Shadows.hlsl


#define MAX_SHADOW_CASCADES 4
#ifndef SHADOWS_SCREEN
#ifdef SHADER_API_GLES
#define SHADOWS_SCREEN 0
#else
#if defined(_SHADOWS_ENABLED) && defined(_SHADOWS_CASCADE) && !defined(SHADER_API_GLES)
#else
#define SHADOWS_SCREEN 0
#endif
#endif

half shadowStrength = GetMainLightShadowStrength();
return SampleShadowmap(shadowCoord, TEXTURE2D_PARAM(_DirectionalShadowmapTexture, sampler_DirectionalShadowmapTexture), shadowSamplingData, shadowStrength);
#endif
}
half LocalLightRealtimeShadowAttenuation(int lightIndex, float3 positionWS)

7
com.unity.render-pipelines.lightweight/LWRP/Shaders/LightweightScreenSpaceShadows.shader


HLSLINCLUDE
// Note: Screenspace shadow resolve is only performed when shadow cascades are enabled
// Shadow cascades require cascade index and shadowCoord to be computed on pixel.
#define _SHADOWS_CASCADE
#pragma prefer_hlslcc gles
#pragma exclude_renderers d3d11_9x
//Keep compiler quiet about Shadows.hlsl.

float3 wpos = mul(unity_CameraToWorld, float4(vpos, 1)).xyz;
//Fetch shadow coordinates for cascade.
float4 coords = TransformWorldToShadowCoord(wpos);
float4 coords = TransformWorldToShadowCoord(wpos);
// Screenspace shadowmap is only used for directional lights which use orthogonal projection.
ShadowSamplingData shadowSamplingData = GetMainLightShadowSamplingData();

HLSLPROGRAM
#pragma multi_compile _ _SHADOWS_SOFT
#pragma multi_compile _ _SHADOWS_CASCADE
#pragma vertex Vertex
#pragma fragment Fragment

1
com.unity.render-pipelines.lightweight/LWRP/Shaders/LightweightStandard.shader


#pragma multi_compile _ _SHADOWS_ENABLED
#pragma multi_compile _ _LOCAL_SHADOWS_ENABLED
#pragma multi_compile _ _SHADOWS_SOFT
#pragma multi_compile _ _SHADOWS_CASCADE
// -------------------------------------
// Unity defined keywords

1
com.unity.render-pipelines.lightweight/LWRP/Shaders/LightweightStandardSimpleLighting.shader


#pragma multi_compile _ _SHADOWS_ENABLED
#pragma multi_compile _ _LOCAL_SHADOWS_ENABLED
#pragma multi_compile _ _SHADOWS_SOFT
#pragma multi_compile _ _SHADOWS_CASCADE
// -------------------------------------
// Unity defined keywords

1
com.unity.render-pipelines.lightweight/LWRP/Shaders/Terrain/LightweightStandardTerrain.shader


#pragma multi_compile _ _SHADOWS_ENABLED
#pragma multi_compile _ _LOCAL_SHADOWS_ENABLED
#pragma multi_compile _ _SHADOWS_SOFT
#pragma multi_compile _ _SHADOWS_CASCADE
// -------------------------------------
// Unity defined keywords

1
com.unity.render-pipelines.lightweight/LWRP/Shaders/Terrain/LightweightStandardTerrainAddPass.shader


#pragma multi_compile _ _SHADOWS_ENABLED
#pragma multi_compile _ _LOCAL_SHADOWS_ENABLED
#pragma multi_compile _ _SHADOWS_SOFT
#pragma multi_compile _ _SHADOWS_CASCADE
// -------------------------------------
// Unity defined keywords

1
com.unity.render-pipelines.lightweight/LWRP/Shaders/Terrain/LightweightStandardTerrainBase.shader


#pragma multi_compile _ _SHADOWS_ENABLED
#pragma multi_compile _ _LOCAL_SHADOWS_ENABLED
#pragma multi_compile _ _SHADOWS_SOFT
#pragma multi_compile _ _SHADOWS_CASCADE
// -------------------------------------
// Unity defined keywords

1
com.unity.render-pipelines.lightweight/LWRP/Shaders/Terrain/LightweightWavingGrass.shader


#pragma multi_compile _ _SHADOWS_ENABLED
#pragma multi_compile _ _LOCAL_SHADOWS_ENABLED
#pragma multi_compile _ _SHADOWS_SOFT
#pragma multi_compile _ _SHADOWS_CASCADE
// -------------------------------------
// Unity defined keywords

1
com.unity.render-pipelines.lightweight/LWRP/Shaders/Terrain/LightweightWavingGrassBillboard.shader


#pragma multi_compile _ _SHADOWS_ENABLED
#pragma multi_compile _ _LOCAL_SHADOWS_ENABLED
#pragma multi_compile _ _SHADOWS_SOFT
#pragma multi_compile _ _SHADOWS_CASCADE
// -------------------------------------
// Unity defined keywords

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